I retract all my previous statements about thinking twice about going turbo. I've got my car up and running now and most of the things that I read about blowthru setups being hard to tune and cast pistons exploding so far haven't been true(knock on wood). I don't have a wideband and I've set my timing by ear and, I'm on pumpgas, the rumors about a boosted motor haven't been true for me. With that being said I will have a wideband and properley set my timing before I go to the track and try to get some numbers, but so far on the street with 7lbs looking at the plugs and setting the fuel pressure is all I've done. I learned alot along the way I figured I would pass on to those building a turbo SB, but take my words with a grain of salt because I am not a professional....

*Stock magnum manifolds are by far the easiest route, I tried headers and have one on the drivers side but run a manifold on the pass. side. If I did it over I would have used them on both.

*My ebay GT45 turbo was nice and so far with about 50miles on it has shown zero signs of trouble. The 1.05 hotside is alittle big for a stock 318 it spools late but comes in hard

*Air-to-air intercoolers take up alot of space. If I do it over again it would be air to water or meth. injection.

*Ebay wastegates and BOV don't seem to be that bad. Mine are chinese knockoffs and seem to function ok although only time will tell

*I run a walbro 190 pump and a mallory 4309 regulator. Both are cheap and seem to be ok for my application. I also love that I can't hear the walbro as opposed to my old blue pump.

*My cheapo stall converter was supposed to be a 2200-2800. It pulls at about 2400 but is way too tight for my car and gear. If I did it over I would try to get something in the 2800-3200 range maybe more. I'm going to a glide anyway because the 904 is already slipping and its rebuilt

*Don't drill out your PCVR's until you get it on the car and see how it runs...although this has probably helped me from going lean and killing my motor already.

*Stock ignition has been fine so far but I will be going to an MSD BTM when I can afford it

Just some things I was thinking about and thought I would share. I'm new to boost so this has been a learning curve but it's always good to share real life experience

UHHH!
Video???

I don't have a video camera lol I do have some pics off my blackberry I am technology limited it cost too much

This car was rough when I got it so I didn't mind cutting holes where I needed them

You will be very glad you stayed with turbo in the long tun. When you start it doesn't seem worth it for the HP... Now I went to the dyno at 8 psi and dynoed 525 RWHP and 600 RWTQ. Just for the hell of it I turned it up to 12 psi and made 581 RWHP and 700 RWTQ. My turbo is choked and peak RPM was at like 5000 ish. Show me a N/A engine that idles at 800 RPM with 14" vac and make that kind of HP and torque. There is lots left with a larger turbo as well. I ran close to mid 11s in a 4200 lb brick so far I can't see any down side of a turbo except the added complexity. Oh and the truck has never seen a drop of fuel over 91 octane on those tunes.

Lol! Your Blackberry does video. I know, my wife has one! Its like crack to her.

Before you change anything else (for power) get a lower AR housing like .8x

Your converter will be perfect. You think it is tight because your AR is too big. Heck, I run a .89 on mine.

I went through much of the same thing when building my first TT440 in 2001. Nobody knew anything about putting a carb under a turbo. It was either some sort of voodoo or or a money sucking folly. Most of the people on Moparts were knocking me down and saying I would fail horribly. A few guys stuck by my side and offered info they thought would help.
As the build progressed more and more people came over to my side. Once it was running well I had the support of most Moparts regulars. I really needed that support because I never had much success with Holley carbs.

It's sad to think that this setup made it into Mopar Muscle Magazine in January 2002.



It's a far cry from the setup that made Popular Hot Rodding in 2009.




Now, there are truckloads of info available on the net, both good and bad. If someone spends the time to do a little research building a blow through turbo isn't that bad. You still find naysayers but stick with it and you'll be fine.

Now that I've played with EFI, I'm not interested in doing another blow through. Maybe your build will progress liks that through the years too.
So far, it sounds like you've done a pretty good job.

The key to the blow through carbs success, is the carb hat you choose. I switched to EFI also and I'd never run a carb again either. Not because they don't work, but because EFI is so much better on a street car. O2 sensors and closed loop are a wonderful thing when gas is $3.50 +. Nice setup on the Valiant. I ran a Gt45 also, and it was a great turbo.

Another pic I dug up. This pic shows the header on the pass side I ended up using a manifold.

Just like the Days of Old!!! 1 person has bad luck with it and all want to say the same. What many forget to mention is that the person with bad luck was probably trying to make a race-car out of a street set-up or vice-versa.

I've talked to a few people and that seems to be the only issue with Blow through set-ups. You set them up for Kill on the Track and they will probably give you fits on the street.

The other thing I have seen Highly suggested is to make sure you get a Carb set-up for Blow Through application by someone with a Good Reputation and track record.

So far looks like a Nice set-up you got going.

I personally like EFI: But I'm from the Tech Generation.(Gen-X)

I Prefer EFI too. Being a 24yo carbs obviously weren't around on production cars anymore but I have always owned a carb mopar. That being said I still think a properly tuned EFI setup is the way to go and I hopefully will be working towards one in the future.

I love that car man

If I stayed with a small block (and wasnt broke) I woulda tried to go turbo. Maybe ill have to turbo the 440

Nice job on the build

hey man, would you mind sharing all the details of your build? as in what you have into it money wise and parts wise? I have been debating whether to throw spray or a turbo/blower on to my low compression 360 j/y motor